October weather forecast
San Marcos, El Salvador

In October, San Marcos experiences the peak of the wet season with the highest level of rainfall at 223mm (8.78") over roughly 24 days. Comparatively, temperature ranges remain consistent with the previous month but a notable drop begins. Advantageously, enhanced wind activity can offer a refreshing offset to the muggy weather, with the wind gusts reaching slightly higher at 8.3 KPH. As the wettest month of the year, outdoor activities might be restricted due to a high possibility of showers. This period also marks a transition from the wet season toward the cooler, drier months of November and December.

Temperature

San Marcos witnesses the coldest weather in October, with temperatures averaging a high of 29.7°C (85.5°F) and a low of 20.5°C (68.9°F).

Heat index

October's heat index is appraised at a torrid 37°C (98.6°F). Incorporate additional preventive steps, heat exhaustion and heat cramps are possible. Long-lasting activity may cause heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Kids often lack the knowledge about the necessity to take breaks and consume liquids. Thirst, as a late symptom of dehydration, necessitates the maintenance of hydration, particularly during enduring physical activities.
Through perspiration, the body has a natural mechanism to eliminate excessive heat via sweat evaporation. When the air holds a significant amount of moisture, the efficiency of the evaporation process is decreased, preventing the body from cooling down efficiently, leading to the sensation of overheating. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.

Humidity

September and October, with an average relative humidity of 82%, are the most humid months.

Rainfall

In San Marcos, in October, it is raining for 23.9 days, with typically 223mm (8.78") of accumulated precipitation. In San Marcos, during the entire year, the rain falls for 196.7 days and collects up to 1216mm (47.87") of precipitation.

Daylight

In October, the average length of the day is 11h and 49min.
On the first day of the month, sunrise is at 05:46 and sunset at 17:46. On the last day of October, sunrise is at 05:51 and sunset at 17:29 CST.

Sunshine

In October, the average sunshine is 8.3h.

UV index

May through December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: A daily maximum UV index of 6 in October translates into the following instructions:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.